Question

Sandy collects two shells at a time to Shawn collect for shells at a time and Sonya collect 10 shells at a time to have the same number of shells what is the least number of shells each friend must collect

Answer 1

seems that you are trying to say that:sandy collects 2 shells at a time (so she doesn't collect 1 or 3 at a time)shawn collects 4 shells at a timesonya collects 10 shells at a time

this is a problem to find the least common multipleone way is to list all the number of shells they can collectthe number of shells sandy can collect is 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28...
the number of shells shawn can collect is 4, 8, 12, 16, 20, 24, 28, 32...
the number of shells sonya can collect is 10, 20, 30, 40, 50...

when is the first common number?
it is 20so answer is 20 shells is the least number they must collect



the way to do it with math is thiswhat is least common mulitpule of 2,4, and 10?factor them2=24=2*210=2*5LCM contains the factors of eachso LCM=2*2*5=4*5=20LCM=20
so least number of shells needed to be collected is 20

Answer 2

Sandy collects 2 shells at a time

Shawn collects 4 shells at a time

Sonya collects 10 shells at a time.

Find the lowest possible number that they all have similar. Look at their factors

2 x 10 = 20

4 x 5 = 20

10 x 2 = 20

20 is the lowest number

hope this helps